Electromagnetic structure.



; A. n. T. LIIBBY & 1. TOMLINSON.

ELECTROMAGNETIC STRUCTURE.

APPLICATION FILED NOV. 11. 19l6.

Patented Alig. 13, 1918.

I mL/N'rE/ .5 ALBION 0.1". LIBBY. EDWA J TOMLINSON.

UNITED STATES PATENT OFFICE.

ALBION ID. '1. LIBIBY, OF EAST ORANGE, AND EDWARD J. TOMLINSON, F NEWARK, NEW JERSEY, ASSIGNORS 'I'O SPLITDORF ELECTRICAL COMPANY, OF NEWARK, NEW

JERSEY.

ELECTROMAGNETIC STRUCTURE.

7 '0 all whom it may concern Be it known that'we, ALBION D. T. LIBBY and EDWARD J. TOMLINSON, citizens'of the a United States, and residents of East Orange and Newark, respectively, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Electromagnet Structures, of which the fol lowing is a specification.

This invention relates to an electro-magnetic structure having an electro-magnet made up of one or more windings and controlling two armatures, all mounted as a unitary structure on a base particularly designed to receive said structure.

g Our complete electro-magnetic structure is especially adapted for use inconnection with the operation of-a generator usedon a variable speed engine such as used. in autovehicles. 4

. One of the objects of our invention is to provide an electrosmagnet having a core that is simple and consequently cheap to mannfactureand one which, will serve several lother functions as well as that of carrying" the magnetic flux produced by the winding or windings around said core.

Another object of our invention is to provide a base for mounting the electro-magnet other parts used in the complete assembled structure thereby reducing the number .of operations to produceth'e entire structure and consequentlyithe cost-thereof.

Other and further-{objects of our inven- 55 tion willbe apparent t o fthose familiar with this type of apparatus from an inspection of the specification and drawing attached thereto.

In the drawing Figure 1 is a top plan view of our complete assembled structure with the cover removed.

Fig. 2 is a left hand elevation of Fig. 1. Fig. 3 is a right hand elevation of Fig. 1. Fig. 4 ice plan view of the base upon which an electromagnetic structure is mounted showing in dotted lines the outline of other parts obtained from the base.

Fig. 5 is a perspective view of the blank used in the construction of the core of the electro-magnet.

Fig. 6 is a perspective view of the complete core assembly made up of two of the Part shown in Fitz, 5.

Specification of Letters Patent.

proper, on and from which may be derived sembly must be scrapped.

Referring now more particularly to the various parts shown in the drawing, 1 is a base, preferably of non-magnetic material, from which the bracket 2 is thrown up to carry the electro-magnet coil structure 44. From the base 1 is also obtained the parts 3, 4, 5, and 6 from which are formed the contact members having the same numbers and illustrated in their operative positions in Figs. 1, 2, and 3. When the base 1 is blanked out the contact members 3, 4, and 5 and support arm 6 are punched from the base at ,the same time that the supporting bracket 2 is throw n n piva rd i S upport bracket 2 has an ear 7 bent at right angles thereto. The ear 7 has a hole 8 for the purpose of receiving the screw that is used to hold the protecting cover over the base. The protecting cover, (not shown) is adapted to fit around the ledge 9 of base 1. Supporting bracket 2 also has another ear 10 used for the purpose of supporting the resistance coil Patented Aug. 13, 1918. Application filed November 11, 1916. Serial No. 130,833;

11 which is fastened thereto by a screw 12 and nut 13.

In the construction of small electro-magnets it has been the universal practice in the past to use round cores the same being made up on automatic screw machines. One of the chief difiiculties of this construction is the difliculty of fastening the heads on to the core so that during the process of winding these heads are very apt to become loosened and forced out of their proper position and it frequently happens that, due to the movement of these heads in the subsequent assembly and operation, the fine wire usually used in coils of'this character be comes broken and hence the entire coil as- It is also recognized by skilled mechanics that in general screw machine products are much more expensive than punched ones. By our method of constructing the core we avoid the above mentioned objections and at the same time produce a coil structure that is much more rigid and one in which the core can be used for other purposes without adding additional parts. In making the core itself we obtain from the proper kind of material a blank 14 which is. subsequently formed into the shape shown by the piece 15 in Fig. 6.

adapted to receive the screws 21 for holding 'reed members 28 and 29 which are riveted to their respective armatures by rivets v30. After the core members 15 and 16 are riveted together as above described one end is tappedat 31 for the reception of screw 32 by which the core is fastenedjto the end supporting arm 6, same being insulated from the base 1 by suitable insulation. The arms 22 and 23 also have'tapped holes 33 and 34 to receive the screws 35 and 36 that are used for the purpose of appg -ing tension to the reed members 28 and 2; In order to prevent the screws 35 and 36 from turning a resilient member 37 is clamped between support arm 6 and the ends ofthe core pieces 15 and 16 by screw 32. The ends of resilient-member 37 have knife edges 38 thrown.

up for the purpose of engaging notches on the screw heads 35 and 36 inorder to prevent the screws fromtu'rning due to vibrations to which the entire structure-is subjected. It willreadily be seen that this method of constructingthe core of the electro-magnet provides a means of fastening the same to the. base by means of screws spaced considerable distant from the center line of the core therebypreventing all tendencies for the electro-magnet to-turn about the center. Furthermore the ends of the core are formed to provide a support for the operating. armatures and also a support for the-means to .adjust the armatures 'to their proper working position. 'Where round cores are used a special piece to take the place of the arms 22 and 23 of the core pieces 15 and 16 must be provided and a special means of attaching this member to the core must also be provided. Our construction -,eliminates these extra parts andthe attendant difliculties required in their construction and assembl It will be noted that the armature 26 carries a contact 39 and the armature 27 carries a contact 40. After the members 3 and and 40 on tile armatures 26 and 27.

4 are blanked out of the base they are formedinto the shape shown more clearly in Fig. 2 and contacts 41 and 42 mounted thereon to coiiperate with the contacts 39 Mem- her 5 after it is punched fronifthe base'is bent to the form shown in Fig. 2 for the in their respective the purpose of operating but lnascircuits in the proper manner,

' much as the electrical circuits used in. connection with our magnetic structure forms impart of our present invention they are not shown or described herein.

It will be readily understood that various changes and alterations may be made in the details of our device-but such changes and alterations are believed ,to come within the scope of the appended claims.

Having, thus described our invention what we claim is I Y 1. An electro-magnetic structure compris- .ing in combination, a base member, a-

punched core, windings for" said core, and, armatures to be actuated by sa d wmd ngs,

said core serving as a means whereby the same is supported at both en'ds by the base member and also as .a supporting means for said armatures.

2. An electro magneti structure comprising in combination, a base having anupturned bracket thereon, a punched core, windings for said core, and armatures to be actuated by said windings, said core having one end fastened to the base, said core end also serving as a support for said armatures, said core having its other end cooperating with the u -turned bracket to furnish a support for sa d core at that end.

' 3. An electro-magnetic structure comprising in combination, a base member, a bore, armature members,,and awinding upon said core, said core being made of two punchings; fastened together and beingshaped to form with the flanges at one end of said core to' support said core upon the base member, the flanges at the other end of said core serving as a supporting means for said armature member's.

. 5. An electro-magnetic structure comprismg in. combination, a basehaving an integral supportin member thereon, a punched core, and win ings for said core, said core having flanges at one end to, coiiperate with said integral supporting member thereby furn shing a support for said core end upon said base, said core having flanges at the other end and ,as'econd support fastened to said base and core between said last ncur tioned flanges. I

6. An tiectro-magnetic structurerbmpris ported upon said base.

ing in combination, a base member, a punched core havlng integral flanges at one end thereof armature members and means to adjust the tension on said armature members, means supported by said eorefor looking said adjusting means in position, the integral flanges of said core serving as a support for said armature members and also as a support for the adjusting means and means to support all the above mentioned parts upon said base.

7. An electro-magnetic structure comprising in combination, a base having an upturned bracket thereon, a core formed of punchings shaped to give flanges at each end thereof, armature members, means to adjust the tension on said armature members, resilient means cooperating withthe last mentioned means to hold the same in its adjusted position, the flanges at one end of. the core being fastened to said upturned bracket to furnish a support for said core, the flanges at the other'end of said core serving as a support for said armature members, and means serving as a secondsupport for the core upon said. base and also to fasten said resilient means to said core.

8. An electromagnetic st ructure comprising in combination, a base member having an up-turned bracket, armature members, means for adjusting the tension on said armatures, a core formed of two punchings fastened together, flanges at one end of said core formed by an oppositely outward bend of said punchings at right angles to the body of said core, flanges at the other end thereof formed by an oppositely outward bend of said punchings at right angles to the body of the core and then a second bend of said punchings at right ngles to said first bend, whereby these last mentioned flanges form a partial inclosure, said last named flanges serving as asupport for said armatures, said inclosure serving as a protection for said adjusting means, and the first mentioned flanges of said core serving as a supporting means for the same upon said up-turned bracket.

9. An electro-magnetie structure comprising in combination, a non-magnetic base, a punched core, armature members, said core being formed at. one end to provide a support for said armature. members, and integral flanges at the other end thereof servin as pole pieces for the armature members and also as a means whereby said core is sup- 10. An electro-magnetie structure comprising in combination, a non-magnetic base having an integral up-turned bracket, a punched core,armaturcs supported on dift'crent punchings of said core at one end thereof, and integral out-turned flanges at the other end of said core, said out-turned flanges serving as pole pieces for said arsy'mmetrical prising in combination. a non-magnetic base, 1

a core formed of punchings. armatures supported by said core punchings and means for adjusting the tension on said armatures, said adjusting means also being supported by said core punchings, and members stamped from the base and arranged thereon at each end of said core thereby serving as a support for said core upon said base.

13. An clectro-magnetic struture comprising in combination, a base member, a two piece core and windings therefor, said core pieces being formed and arranged within the windings as to be T-shaped at one endand U-shaped at the other, armatures supported on the U'shaped ends of said core pieces and extending lengthwise the body of said core pieces, said T-shaped ends serving as pole pieces to cooperate with said armatures, and supporting means extending from said T-shaped ends to said base.

14. An electro-magnetic structure comprising in combination, a basemember, a two piece core and windings therefor, said core piecgs being formed and arranged within the windings as to be T-shaped at one end and U-shaped at the other, arn'iatures supported on the Ushaped ends of said core pieces and extending lengthwise 'the body of said core pieces. said T-shaped ends serving as pole piecesto cotipcrate with said armatures, supportingmeans extending from said T-shaped ends to said base, and an auxiliary support for said core mounted upon said base and attached to said core at the unionof said U-shaped ends.

15. An, electro-magnetic structure comprising in combination, a base member,a punched core having integral flanges at one end thereof. armature members and means to adjust the tension on said armature members, means supported by said core'fonlocking said adjusting means in position, the integral flanges on said core serving as a support for said armature members and also as asupport for the adjusting means, and means including brackets punched from; said base and arranged at each end of said core whereby all the above mentioned part: are supported upon said base member.

.116. An electro-magnetio structure comprising in combination, abase having an upturned bracket, -a punched' core having flanges at one end thereof serving as pole pieces, armatures supported by said core and adapted to cooperate with said pole pi.eces, a coil for said core, an auxiliary coil, said flanges serving alsoas a means for support1ng,said core upon said upturned bracket, and said bracket further serving as a support for said auxiliary coil."

17. An electro-magnetic structure comprising in combination, a base member, a core formed of two punchings out-turned oppositely at each end to give a pair of, symmetrical. flanges at both ends of vsaid core, a coil Wound upon said core, reed members attached to the flanges at one end of said core, armatures secured to said reeds and disposed substantially parallel to each other on either side of said core, said flanges at the other end of said core servingas pole pieces for said armatures, and means whereby all of 5 said parts are mounted upon the basemember'.

Copies of this patent may he obtained for five cents each, by a ddressing the Commissioner of Patents,

the flanges at the other end of said core serving as pole pieces and also cooperating with said upturned bracket to furnish a support for said core, and armatures fastened to said reed members and adapted to cooperate with said'pole pieces.

19. An electro-magnetic structure com.' prislng in co1nb1nat10n,'a basemember', -a' 40 punched core formed to give flanges at both ends thereof, a coil upon said core, said. flanges serving as a means of supporting said core upon the base member and also serving as heads for the spool upon which said coil is'wound.

In Witness whereof We affix our signatures.

" ALBION n 1". LIB-BY. 1

EDWARD J, TOMLINSON.

' Washington, D. 0." 

